Rate of Reaction Quiz

Example Questions From the Test

• 1A reaction is repeated using a more concentrated solution while all other conditions remain unchanged. Why does its rate usually increase?
  • Each reacting particle gains more mass in the concentrated solution
  • There are more reactant particles in a given volume, so collisions occur more frequently
  • The products require less energy to form because less solvent is present
  • The concentrated solution always has a higher final temperature
• 2In a clock reaction, a student measures the time taken for a fixed visible change to occur. If every trial uses the same endpoint, which quantity can be used as a simple measure of relative rate?
  • One divided by the endpoint time, with larger values representing faster rates
  • The final temperature divided by the endpoint time
  • The endpoint time itself, with larger values representing faster rates
  • The endpoint time multiplied by the total solution volume
• 4A reaction produces 60 cm³ of gas during its first 30 seconds. What is its average rate of gas production over that period?
  • 2 cm³/s
  • 5 cm³/s
  • 30 cm³/s
  • 1,800 cm³/s